@article{178084,
      recid = {178084},
      author = {M'Gonigle, John W. and Dalrymple, G. Brent.},
      title = {⁴⁰Ar/³⁹Ar  ages of some Challis Volcanic Group rocks and  the initiation of Tertiary sedimentary basins in  southwestern Montana /},
      publisher = {U.S. G.P.O. ;},
      address = {Washington :},
      pages = {iii, 17 p. :},
      year = {1996},
      note = {"A summary of ⁴⁰Ar/³⁹Ar age analyses of eighteen samples  of volcanic rocks from the Challis Volcanic Group and a  summary of basin stratigraphy in southwestern Montana."},
      url = {http://library.usi.edu/record/178084},
}